Automatic gas cut-off.



B. PULLEN.

AUTOMATIC GAS CUT-OFF.

AAAAAAAAAAAAAAAAA PR: 27, I915. 1,168,415. 1 Patented Jan. 18, 1916.

\s I PZO/ZZ ,App licati onfiled. api i zv,

To allwiiom it may concern:

BaRzI LArrU LEn, "or riiI'LannLrniA, rnivns i'iivnnia, I

AU'r'oii/IArIc Gas ween;

Be it known that I, BARZILLAI PULLEN, a I

"citizen of the United States, residing at provide a Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented new and useful Improvements in Automatic Gas Cut-Ofis, ofwhich the following is a specification. s I i My invention relates to a new and improved automatic cut-off valve for use in connection with 1 gas light burners or systems where slot meters are employed.

The objeot of the invention is to provide a valve which will automatically close when the'flow of gas isgcut-ofi and the a gas ipres sure leaves the feed pipes, thus'preventing subsequentleakage through unlighted burnrs and danger fromasphyxiations or ex 7 plosions.

A further object of the invention to an automatically j closing 7 valve 7 which, after closing, will be heldftightly to reference being; had to the accompanying V Figure 1 is a longi its" seat, any renewed pressure serving, to closeit more firmly against ts seat,so as to render it necessary to manually open the I valve'in order toreserve the flow of gas to the burners; p a

, A still further object of the invention is toprovide a valve which is simple of 'construction, reliable and efiicient in action, and which will remain open as long as there is pressure in the pipe between the meter and stop cock, but which will close immediately [upon the cut-0E of the pressure between the the stop cock and will remain a closed until manually opened for the resumption of thegas supply.

meter and The invention consists of the features of construction, combination and arrangement of :parts herein fully described and claimed-,-

drawing in which:- V

V tudinal section through an automat c gas cut-ofi' embodying my invention, showing the valve in closed position and the valve casing interposed between thesections of a gas feed pipe. Fig.

2 isa similar view 'showing the disk in raised position for the fiow of gas-through the by-pass. Y 7

Referring to the drawing, 1 designates a valve casing, having inlet and outlet ends 2 and 3 which vare internally threaded, as at 4 and5, respectively, to receii'e the threaded .ends of the sections of a gas feed pipe (not shown) between which such valve casing is 1915; SerialNo. 2436a interposed. The casing is arranged invpracties at a pointin the line of the pipe be tween the slot meter and a controlling cock, which may "bethe stop Cook of a furnace, '50 as torbe' governed by the'presence or ISDeCifiCfiOiiOf e Pa en PatentedJandS, 1916; a

absence of gas pressure Within the pipe. The casingisformed with a valve chamber 8 which'also serves asa pressurechamber,

which valve chamber is provided at its bottom portion with a taperedvalve seat9 and p is normally open at itstop to permit of the 'application and reinovalof the valve, and is closed by'a cap orpluglO. The end 20f the valve casing is provided with agas in-f.

takepassage 11 which communicates with the lower portionof the chamber 8 above the plane of the..-valve seat :through a restrictedintake port12,'while the outlet end 3 jfofthe valve casing is provided withan outoutlet port 14:: opening through the bottom .of the valve seatS); valve '15 is arranged for movement within the chamber 8 and comprises a'taperedfdisk adapted to close I such thick- 1 ness that when in closed positionits upper snugly against the seat 9, and of surface lies below the plane of the port 12.

The valve is carried by a-stem 16, the upper endof which moves i'na guide socket or,

recess 17 in the plug 10 and the lower end of which moves in aguide passage or cham-" ber 18 formed in the lower central portion of the valve casing, whereby the valve is accurately guided and centered in its move- Theqvalve is ofproper weight to merits.

drop or 'closeby gravity when not held supported by gas pressure, as scribed. it I As shown, the restricted'po'rtion 14 of the outlet passage 13 ofthe valve casing is closed against direct communication with the valve chamber '8 but communicates-with an enlarged portion 18' of the guide passage 18, between the upper endq-of said guide hereinafter depassage and -therthreaded recess 19, which "chamber or enlargement 18 isconnected at its lower end with thevalve chamber 8 through the medium ofa restricted port or passage 25, openingat its lower end into the passage 18 adjacent toits point of intersection with therecess 19 and at its upper end through the valve seat9. "Fittedin the recess 19 is an externally and internally threaded screw plug 20, and fitted within said plug a second screw plug 26'tlirough] i letzpassage 13 communicating "with the bottom-of the chamber 8 through a restricted ifab l'eyin the(passage 18C is p posed between; said adjusting te ting stem is'felvated motion will beam;

1 Q 5: jtofraise the latterfin thechaniber 8',"Whereby ;.mm open communication with: r the; passage 1 81 {and inlet 12; The disk 277 whichpenfdrms I c the ifunctiqniq of a secondary controlling evel t Zthe passag'e 13; andlihence when the "Valve is: eleirated and; saiddisk is in raised position 1 P 'a zis uflicient amount of gas mayflowby, Way

W "chembel a lfi 'the du'ct 14., and outletfipztsjsage 13? to thebfifnen or burners toersuppl-y "c ume QflICQI'lStIiCtfi-Zd afiea ofthe passage will? serve to. iretai'n "in, the chamber. 8 f gas 1 '1der-kpress1ite to, hold thezvaIve; 15.; elevated ressluehofildkbe[of 21,- low degree arid the 9 i ervice": 'preesureg'gshould fluctuate :to

He fer; he16111 15;git h'fValve open for; serv i'c ectionz ufider thefiiconditio'ns qfientionled valve which may tbeheldiopen'lmv W:- servicefpreseilre iiis' needed; V ill thus befevident that'when'ath'e silpcut oflfth'e "Safety Valve {will o lowerfenc ljofgthe-yalve stem; When the std? ofjpetsons from thei admis'sioooigflsjytoja j;

V *mynicat'ed through 'tlie" 'disk,to-.the: yalve 515;

the disl'fis also-raised: in't'he chzirilben lf8, a -i constz icted passage 25"beihgi thuebrought we iis of a thickness somewhat less.then.) 'I depth of}; the contracted portion: 14 of V 1 f the-latter; While} atvthe Sande time; the voljeiifen-yllina the .-,eyeiit that the normzylcser'vice I coI i siderable 3 extentiaj. Thus provision endinia-ctiWi'llioetheldi" solutelyclosed -by 1 -gIclaima k, L .5; ;V g automatic gas} cut- 01f comprmng a valve; caeinghavin'ggal valvefchambeng ap inlet port communica-tlngi with .the lowcjr portion; of-the fvelve chambe gge;,goidejpnsa 5 theryzvlve chamber'hwingfi s em d pen ing intofl the 'guidergpassage ,en lo'lfltlet' passe-gee 5 "provided, 'w ith' a: restrictedl- -inl t;- commlmi;

eating iththe. gdide paseagg-jani "BARZIELAIBD 11vi1lathusrbe-entire1yobviated: It'w'ill be this puppose is proyidedwhich isriictliable 1 o getvolttofgqrder and which maybe inana jus in 1 i member, and'a vzt'lvedisk loos el'yqmounteti,

c M 7 ..,e d qf-gthemutlet"f"? T m s e, sa d k. b i ei t e d: e ween "aid,51djusting-deVice and theivalye stem anql beingofilessjthick es sthanthe;depthgo'f the i 

